Children are fascinated by the texture, bright colors and odd shapes of these Junior Rainbow Pebbles®. Young learners aged 18m+ will build their fine motor skills when stacking these odd-shaped, plastic pebbles. Sort and sequence these pebbles to develop early math skills. The smooth, warm texture of these pebbles will delight inquisitive hands. Each set includes 36 pieces in 3 shapes and 6 colors, conveniently packaged in a storage jar with lid and carry handle.